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This contribution presents results from a series of compression and undrained triaxial tests to study the mechanical behavior of dump clay from the north of Bohemia. The use of these materials as a foundation for construction can’t be achieved without the adoption of some precautions. This comes from embankment, formed by digging the ground (altered claystone), up to the level of coal mining which is in a sub horizontal stratigraphic layer. A potential static liquefaction behavior was observed in undrained tests for high confinement stress. A structural collapse was noticed with the results obtained in the triaxial test. This collapse is characterized by an unexpected large decrease in deviator and mean effective stress. The soils formed have strength properties that are potentially dangerous. These concepts can improve the use of these kinds of soils in geotechnical engineering work. It continues and expands the results obtained in previous research, especially the future problematic use of these materials as the foundation soil for line or building structures.
Hynek Lahuta; Luis Pais. Research of the Behavior of Clay Materials with Double Porosity. Sustainability 2021, 13, 3219 .
AMA StyleHynek Lahuta, Luis Pais. Research of the Behavior of Clay Materials with Double Porosity. Sustainability. 2021; 13 (6):3219.
Chicago/Turabian StyleHynek Lahuta; Luis Pais. 2021. "Research of the Behavior of Clay Materials with Double Porosity." Sustainability 13, no. 6: 3219.
This paper is focused on sensitivity analysis of the behavior of subsoil foundation systems by considering the variant properties of a fiber concrete slab that result in different relative stiffness of the whole cooperating system. The character of the slab and its properties are very important for the character of external load transfer. However, the character of the subsoil also cannot be neglected because it determines the stress–strain behavior of the entire system and, consequently, the bearing capacity of the structure. The sensitivity analysis was carried out based on experimental results, which included both the stress values in the soil below the foundation structure and settlements of the structure that are characterized by different quantities of fibers in it. Flat GEOKON dynamometers were used for the stress measurements below the observed slab, the strains inside the slab were registered by tensometers, and the settlements were monitored geodetically. This paper is focused on the comparison of soil stresses below the slab for different quantities of fibers in the structure. Results obtained from the experimental stand can contribute to more objective knowledge of the soil-slab interaction, the evaluation of real carrying capacity of the slab, the calibration of corresponding numerical models, the optimization of quantity of fibers in the slab and finally, contribute to higher safety and more economical designs of slabs.
Eva Hrubesova; Marek Mohyla; Hynek Lahuta; Tan-Trung Bui; Phi Dinh Nguyen. Experimental Analysis of Stresses in Subsoil below a Rectangular Fiber Concrete Slab †. Sustainability 2018, 10, 2216 .
AMA StyleEva Hrubesova, Marek Mohyla, Hynek Lahuta, Tan-Trung Bui, Phi Dinh Nguyen. Experimental Analysis of Stresses in Subsoil below a Rectangular Fiber Concrete Slab †. Sustainability. 2018; 10 (7):2216.
Chicago/Turabian StyleEva Hrubesova; Marek Mohyla; Hynek Lahuta; Tan-Trung Bui; Phi Dinh Nguyen. 2018. "Experimental Analysis of Stresses in Subsoil below a Rectangular Fiber Concrete Slab †." Sustainability 10, no. 7: 2216.
The paper is focused on the sensitivity analysis of behaviour of the subsoil – foundation system as regards the variant properties of fibre-concrete slab resulting into different relative stiffness of the whole cooperating system. The character of slab and its properties are very important for the character of external load transfer, but the character of subsoil cannot be neglected either because it determines the stress-strain behaviour of the all system and consequently the bearing capacity of structure. The sensitivity analysis was carried out based on experimental results, which include both the stress values in soil below the foundation structure and settlements of structure, characterized by different quantity of fibres in it. Flat dynamometers GEOKON were used for the stress measurements below the observed slab, the strains inside slab were registered by tensometers, the settlements were monitored geodetically. The paper is focused on the comparison of soil stresses below the slab for different quantity of fibres in structure. The results obtained from the experimental stand can contribute to more objective knowledge of soil – slab interaction, to the evaluation of real carrying capacity of the slab, to the calibration of corresponding numerical models, to the optimization of quantity of fibres in the slab, and finally, to higher safety and more economical design of slab.
E Hrubesova; Hynek Lahuta; M Mohyla; T B Quang; N D Phi. Experimental sensitivity analysis of subsoil-slab behaviour regarding degree of fibre-concrete slab reinforcement. IOP Conference Series: Earth and Environmental Science 2018, 143, 012005 .
AMA StyleE Hrubesova, Hynek Lahuta, M Mohyla, T B Quang, N D Phi. Experimental sensitivity analysis of subsoil-slab behaviour regarding degree of fibre-concrete slab reinforcement. IOP Conference Series: Earth and Environmental Science. 2018; 143 (1):012005.
Chicago/Turabian StyleE Hrubesova; Hynek Lahuta; M Mohyla; T B Quang; N D Phi. 2018. "Experimental sensitivity analysis of subsoil-slab behaviour regarding degree of fibre-concrete slab reinforcement." IOP Conference Series: Earth and Environmental Science 143, no. 1: 012005.
The paper is focused on the interaction of the fibre reinforced concrete slab and the subsoil using both the results of experimental measurements on the experimental stand. Performed experimental measurements include monitoring of the concentrically loaded concrete slab with the dimensions of 2 m x 2 m and thickness of 0.15 m. This slab is in the interaction with subsoil of sandy clay character. The experimental load is applied in sequential steps by using a hydraulic press. During the tests the strain gauges and hydrostatic levelling method were used for the monitoring of the settlements of the slab. The contact stresses and the stresses corresponding to a certain depth below the slab were monitored by using a flat pressure cells. In the conclusion of this paper there are formulated the basic aspects of concrete slab-subsoil interaction, the results of various performed experimental measurements and the comparison of stress below the surface resulted from interaction of soil and slab of different degree of reinforcement.
Hynek Lahuta; Eva Hrubesova; Marek Mohyla; Lukáš Ďuriš; Miroslav Pinka. Assessment of Fiber Reinforced Concrete Slab and Subsoil Interaction - Experiment. Key Engineering Materials 2018, 761, 169 -172.
AMA StyleHynek Lahuta, Eva Hrubesova, Marek Mohyla, Lukáš Ďuriš, Miroslav Pinka. Assessment of Fiber Reinforced Concrete Slab and Subsoil Interaction - Experiment. Key Engineering Materials. 2018; 761 ():169-172.
Chicago/Turabian StyleHynek Lahuta; Eva Hrubesova; Marek Mohyla; Lukáš Ďuriš; Miroslav Pinka. 2018. "Assessment of Fiber Reinforced Concrete Slab and Subsoil Interaction - Experiment." Key Engineering Materials 761, no. : 169-172.
Paulo Carvalho; Luís Pais; Luís Gomes; Luís Pinto; Hynek Lahuta. Contribution to the Hydrogeological Characterization of the Gardunha Mountain - Portugal. Procedia Engineering 2016, 161, 868 -874.
AMA StylePaulo Carvalho, Luís Pais, Luís Gomes, Luís Pinto, Hynek Lahuta. Contribution to the Hydrogeological Characterization of the Gardunha Mountain - Portugal. Procedia Engineering. 2016; 161 ():868-874.
Chicago/Turabian StylePaulo Carvalho; Luís Pais; Luís Gomes; Luís Pinto; Hynek Lahuta. 2016. "Contribution to the Hydrogeological Characterization of the Gardunha Mountain - Portugal." Procedia Engineering 161, no. : 868-874.
Hynek Lahuta. LABORATORY TESTS OF DUMP MATEIAL FROM COAL MINE. 16th International Multidisciplinary Scientific GeoConference SGEM2016, Informatics, Geoinformatics and Remote Sensing 2016, 1 .
AMA StyleHynek Lahuta. LABORATORY TESTS OF DUMP MATEIAL FROM COAL MINE. 16th International Multidisciplinary Scientific GeoConference SGEM2016, Informatics, Geoinformatics and Remote Sensing. 2016; ():1.
Chicago/Turabian StyleHynek Lahuta. 2016. "LABORATORY TESTS OF DUMP MATEIAL FROM COAL MINE." 16th International Multidisciplinary Scientific GeoConference SGEM2016, Informatics, Geoinformatics and Remote Sensing , no. : 1.
This paper has in purpose contribute to design micropiles [1] and [4] from views buckling, then for end bearing micropiles. More approach generally exist, how the buckling calculate - from classical concrete practice (without soil resistance) until past procedure from concrete theory with influence coefficient k - background reaction. When you use computing software systems (eg. GEO 4), results of this calculation display of micropile aberration (horizontal deformation) when you enter the load at the ultimate skin friction (ie. design is not check). Ischebeck company [3] recommend approach for design of micropiles. This approach contents coefficients, equations and graphs, which display maximum load for soils describe total cohesion cu. Nevertheless from tabular result, that for some type soil (cohesion, soft consistence (or very soft) with cu 25-40 kPa) isn’t need consider risk buckling and therefore was perform sample calculation for micropile with impact these relations.
Hynek Lahuta; Josef Aldorf; Eva Hrubesova; Helena Rubisarova; Adam Janicek. Influence of Buckling at the Rod Micropiles. Procedia Engineering 2016, 142, 328 -333.
AMA StyleHynek Lahuta, Josef Aldorf, Eva Hrubesova, Helena Rubisarova, Adam Janicek. Influence of Buckling at the Rod Micropiles. Procedia Engineering. 2016; 142 ():328-333.
Chicago/Turabian StyleHynek Lahuta; Josef Aldorf; Eva Hrubesova; Helena Rubisarova; Adam Janicek. 2016. "Influence of Buckling at the Rod Micropiles." Procedia Engineering 142, no. : 328-333.
Hynek Lahuta. RESULTS OF LABORATORY TESTING OF STRENGTH AND STRAIN PROPERTIES OF THE DUMP MATERIAL FROM THE COAL MINES IN NORTHERN BOHEMIA. 14th SGEM GeoConference on SCIENCE AND TECHNOLOGIES IN GEOLOGY, EXPLORATION AND MINING 2014, 1 .
AMA StyleHynek Lahuta. RESULTS OF LABORATORY TESTING OF STRENGTH AND STRAIN PROPERTIES OF THE DUMP MATERIAL FROM THE COAL MINES IN NORTHERN BOHEMIA. 14th SGEM GeoConference on SCIENCE AND TECHNOLOGIES IN GEOLOGY, EXPLORATION AND MINING. 2014; ():1.
Chicago/Turabian StyleHynek Lahuta. 2014. "RESULTS OF LABORATORY TESTING OF STRENGTH AND STRAIN PROPERTIES OF THE DUMP MATERIAL FROM THE COAL MINES IN NORTHERN BOHEMIA." 14th SGEM GeoConference on SCIENCE AND TECHNOLOGIES IN GEOLOGY, EXPLORATION AND MINING , no. : 1.
Deep mining of mineral resources causes extensive changes in rock environment and ground morphology and must be considered in the land use planning. Subsidence as a result of underground mining activities in terrains is one of the serious geological hazards because they can effect slopes and damage engineering structures, settlement areas, natural lakes and allow infiltration of contaminant into the groundwater. The main aim of this article was implementation of the building site categories of underground mining regions into the land use plans. This case study area was selected from the region of Orlova town within the Ostrava-Karvina Coal district, and this region is one of the most affected areas by underground mining of black coal in the Czech Republic. Certain risk categories of land, where the individual categories express generalized influence of deep mining of coal in current and planned constructions were also represented in this article. Extensive variations caused by underground mining were identified within a wide variability of risk categories. An important finding was also the extensive variability over time, manifested by spatial variations in the stated categories in the studied time periods. Moreover, technical documentation of environmental impacts related to underground mining activities was provided; importance of existing and proposed underground mining projects that may significantly impact the land use was discussed and pointed out in this article, especially.
Marian Marschalko; Isik Yilmaz; Martin Bednárik; Karel Kubečka; Hynek Lahuta; Işık Yilmaz. Relevance of building site categories implementation into the land use plan in underground mining area in the region of Petrvald (Czech Republic). Environmental Earth Sciences 2014, 72, 3443 -3456.
AMA StyleMarian Marschalko, Isik Yilmaz, Martin Bednárik, Karel Kubečka, Hynek Lahuta, Işık Yilmaz. Relevance of building site categories implementation into the land use plan in underground mining area in the region of Petrvald (Czech Republic). Environmental Earth Sciences. 2014; 72 (9):3443-3456.
Chicago/Turabian StyleMarian Marschalko; Isik Yilmaz; Martin Bednárik; Karel Kubečka; Hynek Lahuta; Işık Yilmaz. 2014. "Relevance of building site categories implementation into the land use plan in underground mining area in the region of Petrvald (Czech Republic)." Environmental Earth Sciences 72, no. 9: 3443-3456.
Hynek Lahuta. DYNAMIC THERMAL PERFORMANCE OF BUILDING STRUCTURES IN EXPERIMENTAL LIGHTWEIGHT TIMBER-FRAME PASSIVE HOUSE. 2013, 1 .
AMA StyleHynek Lahuta. DYNAMIC THERMAL PERFORMANCE OF BUILDING STRUCTURES IN EXPERIMENTAL LIGHTWEIGHT TIMBER-FRAME PASSIVE HOUSE. . 2013; ():1.
Chicago/Turabian StyleHynek Lahuta. 2013. "DYNAMIC THERMAL PERFORMANCE OF BUILDING STRUCTURES IN EXPERIMENTAL LIGHTWEIGHT TIMBER-FRAME PASSIVE HOUSE." , no. : 1.
Hynek Lahuta. STABILITY ANALYSIS OF THE LARGE SCALE DUMP IN THE CZECH REPUBLIC. 13th SGEM GeoConference on SCIENCE AND TECHNOLOGIES IN GEOLOGY, EXPLORATION AND MINING 2013, 1 .
AMA StyleHynek Lahuta. STABILITY ANALYSIS OF THE LARGE SCALE DUMP IN THE CZECH REPUBLIC. 13th SGEM GeoConference on SCIENCE AND TECHNOLOGIES IN GEOLOGY, EXPLORATION AND MINING. 2013; ():1.
Chicago/Turabian StyleHynek Lahuta. 2013. "STABILITY ANALYSIS OF THE LARGE SCALE DUMP IN THE CZECH REPUBLIC." 13th SGEM GeoConference on SCIENCE AND TECHNOLOGIES IN GEOLOGY, EXPLORATION AND MINING , no. : 1.
Hynek Lahuta. BEHAVIOUR SUBSOIL OF SLAB FOUNDATION UNDER LOADING. 15th International Multidisciplinary Scientific GeoConference SGEM2015, INFORMATICS, GEOINFORMATICS AND REMOTE SENSING 2011, 1 .
AMA StyleHynek Lahuta. BEHAVIOUR SUBSOIL OF SLAB FOUNDATION UNDER LOADING. 15th International Multidisciplinary Scientific GeoConference SGEM2015, INFORMATICS, GEOINFORMATICS AND REMOTE SENSING. 2011; ():1.
Chicago/Turabian StyleHynek Lahuta. 2011. "BEHAVIOUR SUBSOIL OF SLAB FOUNDATION UNDER LOADING." 15th International Multidisciplinary Scientific GeoConference SGEM2015, INFORMATICS, GEOINFORMATICS AND REMOTE SENSING , no. : 1.